Puzzling $B(E2;0^+\rightarrow 2^+)$ strength in the proton dripline nucleus $^{36}$Ca
| Title: | Puzzling $B(E2;0^+\rightarrow 2^+)$ strength in the proton dripline nucleus $^{36}$Ca |
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| Authors: | Xu, Z. C., Wang, S. M., Beck, T., Gade, A., Nazarewicz, W. |
| Publication Year: | 2025 |
| Collection: | Nuclear Experiment Nuclear Theory |
| Subject Terms: | Nuclear Theory, Nuclear Experiment |
| More Details: | Recent measurements of the $E2$ transition rate from the ground state to the first 2$^+$ excited state of the proton dripline nucleus $^{36}$Ca show an unusual pattern when compared to its isotopic neighbor $^{38}$Ca: despite having a higher $E_x(2_1^+)$ excitation energy, the $B(E2; 0^+_1\rightarrow 2^+_1)$ rate in $^{36}$Ca is larger. The question that naturally arises is to what extent this observation can be attributed to the unbound character of the $2^+_1$ state. To understand the influence of the continuum space on the low-energy properties of $^{36}$Ca, we carried out Gamow shell model calculations that can account for the continuum coupling effects. We found that in the threshold $2^+$ state, $^{36}$Ca is spatially diffused, which accounts for the abnormal $B(E2)$ trend observed. Comment: 6 pages, 5 figures |
| Document Type: | Working Paper |
| Access URL: | http://arxiv.org/abs/2502.14106 |
| Accession Number: | edsarx.2502.14106 |
| Database: | arXiv |
| Description not available. |